Delphi RS-232 manual Received Keyword 2000 Messages, Format byte

Page 14

SAINT

Keyword 2000 to RS-232 Gateway

01/20/04

Page 13 of 20

4.4.3Received Keyword 2000 Messages

The following are the 4 possible formats of a received Keyword 2000 message with time stamp information:

 

 

 

 

 

 

Header

 

Format

 

SID

 

N Data Bytes

Checksum

Time MSB

 

Time LSB

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

29h

 

 

Byte2

Byte 3

 

Bytes 4 - (3+N)

Byte 4+N

 

Byte 5+N

 

Byte 6+N

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Header

 

 

Format

Length

 

SID

 

 

N Data Bytes

Checksum

 

Time MSB

 

Time LSB

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

29h

 

 

Byte2

Byte 3

 

 

Byte 4

 

Bytes 5 - (4+N)

Byte 5+N

 

Byte 6+N

 

Byte 7+N

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Header

Format

 

Target

Source

 

SID

 

N Data Bytes

 

Checksum

 

Time MSB

 

Time LSB

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

29h

 

 

Byte2

 

Byte 3

Byte 4

 

Byte 5

Bytes 6 - (5+N)

 

Byte 6+N

 

Byte 7+N

 

Byte 8+N

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Header

 

Format

 

Target

 

Source

 

 

Length

 

SID

 

N Data Bytes

 

Checksum

 

Time MSB

 

Time LSB

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

29h

 

Byte2

 

Byte 3

 

Byte 4

 

 

Byte 5

 

Byte 6

 

Bytes 7 - (6+N)

 

Byte 7+N

 

Byte 8+N

 

 

Byte 9+N

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

4.4.4Format byte

The format byte contains a 6-bit length information and a 2-bit address mode information.

Bit 7

Bit 6

Address Information

 

 

 

 

0

0

no address informatio

 

 

 

0

1

exception mode (CARB)

 

 

 

1

0

with address information, physical addressing

1

1

with address information, functional addressing

Bit 5

Bit 4

Bit 3

Bit 2

Bit 1

Bit 0

Length

 

X

X

X

X

X

X

Define length of message from the Data to Checksum (not

included) bytes . A message length of 1 to 63 bytes is possible. If bits 5-0 are zero then the additional length byte is included. Refer to the “Keyword Protocol 2000 Data Link Layer Recommended Practice” section 4.1.1 for more information.

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Contents Audio Systems Delphi Automotive Systems Corporation Table of Contents SaintRevision Log Precedence IntroductionScope Definitions and NomenclatureOverview Baud Rate RS-232 SetupBuffering and Flow Control Message Format Data StreamMessages IDs Header Data Description Gateway CommandsGateway Messages Code Description Gateway ReportsHeader Description Data Bytes Keyword 2000 Commands Keyword 2000 MessagesKeyword 2000 Timeout/Errors Transmitted Keyword 2000 Messages Received Keyword 2000 Messages Format byteLength byte Target address byteSource address byte Data bytesBus and Power Connector J4-DB9M ConnectorsRS-232 Connector J3-DB9F DE-9s Pin # UseFlash programming connector Pin # Mnemonic Use / descriptionLEDs PurposeSwitches Mnemonic Purpose03/12/03 Keyword 2000 initial release Software PackagesName Hardware Date Description Version

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